A while back, I had F4 installed on my D drive. I had a drive issue, and had to replace said drive. I was able to copy the folder over to the new drive, and I assumed all was well. I have recently begun to get my flight sims up and running again( my first love...), but I can't uninstall nor reinstall F4AF. I keep getting an invalid drive message, then the installer quits. I assume it's a registry issue, but I have registry mechanic. I have also tried the Windows Installer cleaner, but that didn't help either. Could someone help please? THANKS.